<ARTICLE> UT
<LEGEND>
THIS SECTION OF THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE CONSOLIDATED FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    1,055,501
<OTHER-PROPERTY-AND-INVEST>                          0
<TOTAL-CURRENT-ASSETS>                          33,499
<TOTAL-DEFERRED-CHARGES>                        46,524
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               1,135,524
<COMMON>                                        85,474
<CAPITAL-SURPLUS-PAID-IN>                      192,717
<RETAINED-EARNINGS>                             63,698
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 341,889
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<LONG-TERM-DEBT-NET>                           467,452
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                  96,675
<LONG-TERM-DEBT-CURRENT-PORT>                        0
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                     15,652
<LEASES-CURRENT>                                   475
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 213,381
<TOT-CAPITALIZATION-AND-LIAB>                1,135,524
<GROSS-OPERATING-REVENUE>                      109,238
<INCOME-TAX-EXPENSE>                            15,397
<OTHER-OPERATING-EXPENSES>                      48,792
<TOTAL-OPERATING-EXPENSES>                      64,189
<OPERATING-INCOME-LOSS>                         45,049
<OTHER-INCOME-NET>                                 355
<INCOME-BEFORE-INTEREST-EXPEN>                  45,404
<TOTAL-INTEREST-EXPENSE>                        20,524
<NET-INCOME>                                    24,880
<PREFERRED-STOCK-DIVIDENDS>                          0
<EARNINGS-AVAILABLE-FOR-COMM>                   24,880
<COMMON-STOCK-DIVIDENDS>                        30,000
<TOTAL-INTEREST-ON-BONDS>                       14,611
<CASH-FLOW-OPERATIONS>                          55,178
<EPS-BASIC>                                     24,880
<EPS-DILUTED>                                   24,880